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2021 BMW I3
Range Extender•RWD•AUTOMATIC•hybrid
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Repairs0Labor318Torque3717Fluid6DTC2228Battery1Maintenance0Recalls0
CC-ID-104high severityPowertrain

Gearbox Overheating - Reduced Output

on 2021 BMW i3 Range Extender · RWD

What this code means

The transmission has overheated and output is being reduced to protect it. This is raised by the transmission control module.

Symptoms

  • Reduced engine/transmission power
  • Overheating warning message
  • Limited acceleration

Common causes

  • Continued overheating condition
  • Low transmission fluid
  • Failed transmission cooler
  • Heavy towing or load

Diagnostic steps

  1. Read transmission fault codes
  2. Allow transmission to cool and recheck
  3. Inspect fluid level and cooler
  4. Test temperature sensor circuit
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